230 lines
4.0 KiB
HTML
230 lines
4.0 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
|
|
<HTML
|
|
><HEAD
|
|
><TITLE
|
|
>IrDA Protocols</TITLE
|
|
><META
|
|
NAME="GENERATOR"
|
|
CONTENT="Modular DocBook HTML Stylesheet Version 1.7"><LINK
|
|
REL="HOME"
|
|
TITLE="Linux Infrared HOWTO"
|
|
HREF="index.html"><LINK
|
|
REL="UP"
|
|
TITLE="Advanced Topics"
|
|
HREF="infrared-howto-c-advanced-topics.html"><LINK
|
|
REL="PREVIOUS"
|
|
TITLE="Performance Testing"
|
|
HREF="infrared-howto-s-performance-testing.html"><LINK
|
|
REL="NEXT"
|
|
TITLE="FAQ"
|
|
HREF="infrared-howto-s-faq.html"></HEAD
|
|
><BODY
|
|
CLASS="sect1"
|
|
BGCOLOR="#FFFFFF"
|
|
TEXT="#000000"
|
|
LINK="#0000FF"
|
|
VLINK="#840084"
|
|
ALINK="#0000FF"
|
|
><DIV
|
|
CLASS="NAVHEADER"
|
|
><TABLE
|
|
SUMMARY="Header navigation table"
|
|
WIDTH="100%"
|
|
BORDER="0"
|
|
CELLPADDING="0"
|
|
CELLSPACING="0"
|
|
><TR
|
|
><TH
|
|
COLSPAN="3"
|
|
ALIGN="center"
|
|
>Linux Infrared HOWTO</TH
|
|
></TR
|
|
><TR
|
|
><TD
|
|
WIDTH="10%"
|
|
ALIGN="left"
|
|
VALIGN="bottom"
|
|
><A
|
|
HREF="infrared-howto-s-performance-testing.html"
|
|
ACCESSKEY="P"
|
|
>Prev</A
|
|
></TD
|
|
><TD
|
|
WIDTH="80%"
|
|
ALIGN="center"
|
|
VALIGN="bottom"
|
|
>Chapter 5. Advanced Topics</TD
|
|
><TD
|
|
WIDTH="10%"
|
|
ALIGN="right"
|
|
VALIGN="bottom"
|
|
><A
|
|
HREF="infrared-howto-s-faq.html"
|
|
ACCESSKEY="N"
|
|
>Next</A
|
|
></TD
|
|
></TR
|
|
></TABLE
|
|
><HR
|
|
ALIGN="LEFT"
|
|
WIDTH="100%"></DIV
|
|
><DIV
|
|
CLASS="sect1"
|
|
><H1
|
|
CLASS="sect1"
|
|
><A
|
|
NAME="infrared-howto-s-irda-protocols"
|
|
></A
|
|
>5.10. IrDA Protocols</H1
|
|
><DIV
|
|
CLASS="sect2"
|
|
><H2
|
|
CLASS="sect2"
|
|
><A
|
|
NAME="AEN1524"
|
|
></A
|
|
>5.10.1. IrDA Stack</H2
|
|
><P
|
|
>
|
|
<DIV
|
|
CLASS="figure"
|
|
><A
|
|
NAME="AEN1527"
|
|
></A
|
|
><P
|
|
><B
|
|
>Figure 5-1. IrDA Stack</B
|
|
></P
|
|
><DIV
|
|
CLASS="mediaobject"
|
|
><P
|
|
><IMG
|
|
SRC="images/irda_stack.jpg"><DIV
|
|
CLASS="caption"
|
|
><P
|
|
> IrDA Stack.
|
|
</P
|
|
></DIV
|
|
></P
|
|
></DIV
|
|
></DIV
|
|
>
|
|
|
|
</P
|
|
></DIV
|
|
><DIV
|
|
CLASS="sect2"
|
|
><H2
|
|
CLASS="sect2"
|
|
><A
|
|
NAME="AEN1536"
|
|
></A
|
|
>5.10.2. Existing IrDA Protocol Implementations</H2
|
|
><P
|
|
> From Lichen Wang I have taken these remarks:
|
|
</P
|
|
><P
|
|
> IrLAP, IrLMP, and TinyTP are pretty stable now. But various individual
|
|
implementations may still have quirks.
|
|
</P
|
|
><P
|
|
> IrCOMM is widely used, but Microsoft vowed to drop it and use IrSocket
|
|
only.
|
|
</P
|
|
><P
|
|
> IrObex, IrMC, IrTran-P, etc. are showing up in various devices. The
|
|
supports on PC are segmented and sometimes very poor.
|
|
</P
|
|
><P
|
|
> New IrDA Protocol Development
|
|
|
|
AIR is pushed mainly by IBM. You get wider angle and longer distance
|
|
(10M?) but may be at lower data rate. You can also time-multiplex this
|
|
already slow channel. In my opinion the benefit to the user is very
|
|
little. AIR hardware and software changes are costly. I think you will
|
|
have to wait for a long time, if ever, to see any product using AIR.
|
|
</P
|
|
><P
|
|
> IrBUS is pushed mainly by Sharp. It is aimed at remote control, IR
|
|
keyboard, etc., not for data communication. I think if Sharp succeed,
|
|
you may see IrBUS in set-top boxes, web-tv, etc. If and when these
|
|
devices reaches a critical mass, some PC may incorporate IrBUS in
|
|
order to control these devices.
|
|
</P
|
|
><P
|
|
> VFIR is the latest. The benefit is higher data rate (16 Mbps). Unlike
|
|
AIR and IrBUS, the software changes for VFIR are minimum. The changes
|
|
are mainly in hardware.
|
|
</P
|
|
><P
|
|
> In summary, I do not think we need to wait in anticipation of new IrDA
|
|
protocols. A easy to install and solid implementation of the existing
|
|
IrDA protocols is the cutting edge!.
|
|
</P
|
|
></DIV
|
|
></DIV
|
|
><DIV
|
|
CLASS="NAVFOOTER"
|
|
><HR
|
|
ALIGN="LEFT"
|
|
WIDTH="100%"><TABLE
|
|
SUMMARY="Footer navigation table"
|
|
WIDTH="100%"
|
|
BORDER="0"
|
|
CELLPADDING="0"
|
|
CELLSPACING="0"
|
|
><TR
|
|
><TD
|
|
WIDTH="33%"
|
|
ALIGN="left"
|
|
VALIGN="top"
|
|
><A
|
|
HREF="infrared-howto-s-performance-testing.html"
|
|
ACCESSKEY="P"
|
|
>Prev</A
|
|
></TD
|
|
><TD
|
|
WIDTH="34%"
|
|
ALIGN="center"
|
|
VALIGN="top"
|
|
><A
|
|
HREF="index.html"
|
|
ACCESSKEY="H"
|
|
>Home</A
|
|
></TD
|
|
><TD
|
|
WIDTH="33%"
|
|
ALIGN="right"
|
|
VALIGN="top"
|
|
><A
|
|
HREF="infrared-howto-s-faq.html"
|
|
ACCESSKEY="N"
|
|
>Next</A
|
|
></TD
|
|
></TR
|
|
><TR
|
|
><TD
|
|
WIDTH="33%"
|
|
ALIGN="left"
|
|
VALIGN="top"
|
|
>Performance Testing</TD
|
|
><TD
|
|
WIDTH="34%"
|
|
ALIGN="center"
|
|
VALIGN="top"
|
|
><A
|
|
HREF="infrared-howto-c-advanced-topics.html"
|
|
ACCESSKEY="U"
|
|
>Up</A
|
|
></TD
|
|
><TD
|
|
WIDTH="33%"
|
|
ALIGN="right"
|
|
VALIGN="top"
|
|
>FAQ</TD
|
|
></TR
|
|
></TABLE
|
|
></DIV
|
|
></BODY
|
|
></HTML
|
|
> |